"Whether FB or online SIGs or, of course, the AML forum, I think that Mensans in general are missing out if they are not participating *somewhere* that other Mensans hang out. Many people in this group have said that they joined, stay in, and love Mensa for the social aspects -- and online venues are a really good way to socialize between in-person events.
Personally, since my chosen vocation involves creating awesome online spaces applications for highly intelligent people, I am online a lot. As Allison said, there are only so many hours in the day. Between all of the places I listed above, and many more, I keep pretty busy participating at a level that I enjoy in all of those places...which really isn't "heavily" in any of them...certainly not all day every day. I pay special attention to the AML forum, since I am the Community Admin, but I was very active before that - I just like it and I like the people who are there.
FB is often the more difficult, since a topic can be posted and hit 500+ comments in a matter of hours then, the next day, scroll down toward the bottom...I always feel like I'm playing catch-up, so I jump into topics that interest me and just lightly read some of the rest. I can keep up with a handful of topics that I like, and leave the others to be populated with people who are interested in them.
As for candidates - in the past, Mensa members have been critical and suspicious of candidates who blast in during the campaign, then leave after they have won or lost. I'd prefer a candidate who does participate already online, and doesn't just make the effort to win votes."